The fuel mileage increases will come by getting CAFE credits not the actual MPG... They may reach there goal by credits along and only achieve a modest increase in MPG.
A example would be by switching to new refrigerant (R1234YF) they would receive a 7 to 8% credit on MPG even tho it does not increase MPG... Any thing they can do to reduce weight would apply to CAFE fuel credits..
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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